Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF HTML

BQ2050 Datasheet(PDF) 2 Page - Texas Instruments

Click here to check the latest version.
Part No. BQ2050
Description  Lithium Ion Power Gauge™ IC
Download  21 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo 

BQ2050 Datasheet(HTML) 2 Page - Texas Instruments

 
Zoom Inzoom in Zoom Outzoom out
 2 / 21 page
background image
Pin Descriptions
LCOM
LED common output
Open-drain output switches VCC to source
current for the LEDs. The switch is off dur-
ing initialization to allow reading of the soft
pull-up
or
pull-down
program
resistors.
LCOM is also high impedance when the dis-
play is off.
SEG1
SEG5
LED display segment outputs (dual func-
tion with PROG1–PROG6)
Each output may activate an LED to sink
the current sourced from LCOM.
PROG1
PROG2
Programmed full count selection inputs
(dual function with SEG1–SEG2)
These three-level input pins define the pro-
grammed full count (PFC) thresholds de-
scribed in Table 2.
PROG3
PROG4
Power gauge rate selection inputs (dual
function with SEG3–SEG4)
These three-level input pins define the scale
factor described in Table 2.
PROG5
Self-discharge rate selection (dual func-
tion with SEG5)
This
three-level
input
pin
defines
the
selfdischarge and battery compensation fac-
tors as shown in Table 1.
PROG6
Capacity initialization selection
This three-level pin defines the battery state
of charge at reset as shown in Table 1.
N/C
No connect
SR
Sense resistor input
The voltage drop (VSR) across the sense re-
sistor RS is monitored and integrated over
time to interpret charge and discharge activ-
ity. The SR input is tied between the nega-
tive terminal of the battery and the sense re-
sistor. VSR <VSS indicates discharge, and VSR
>VSS indicates charge. The effective voltage
drop, VSRO, as seen by the bq2050 is VSR +
VOS .
DISP
Display control input
DISP high disables the LED display. DISP
tied to VCC allows PROGX to connect directly
to VCC or VSS instead of through a pull-up or
pull-down resistor. DISP floating allows the
LED display to be active during charge.
DISP low activates the display. See Table 1.
SB
Secondary battery input
This input monitors the battery cell voltage
potential through a high-impedance resis-
tive divider network for end-of-discharge
voltage (EDV) thresholds, and battery re-
moved.
RBI
Register backup input
This pin is used to provide backup potential to
the bq2050 registers during periods when
VCC
≤ 3V. A storage capacitor or a battery
can be connected to RBI.
DQ
Serial I/O pin
This is an open-drain bidirectional pin.
REF
Voltage reference output for regulator
REF provides a voltage reference output for
an optional micro-regulator.
VCC
Supply voltage input
VSS
Ground
2
bq2050


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn